Machine for measuring and dispensing variable volumes of liquids



April 22, 1952 1 L ET AL 2,593,889

MACHINE FOR MEASURING AND DISPENSING VARIABLE VOLUMES OF LIQUIDS. Filed June 20, 1946 INVEN T0125 for; a kl a 7:. L l a 511/ a 1 mm 41% Patented Apr. 22, 1952 MACHINE FOR MEASURING AND DISPENS- ING VARIABLE "OLUMES F LIQUIDS Joseph Kahl and George H. Muller, New York,

N. saidMuller assignor to G. M. Manufacturing Company, New York, NMY.

Application June 20, 1946, Serial No. 677,978

This invention relates to improvements in a machine for measuring and dispensing variable volumes of liquids, and it consists in the novel features which are hereinafter described.

One of the objects of the improvement is to providea means for quickly changing from one volume of liquid to be dispensed by the machine to another required volume.

Another object is to provide a means for ad justing the said required volume with great .precision.

A further object is to secure the said desired volume against accidental change.

A still other object is to provide the piston of the measuring cylinder ofthe machine, which is hereinafter described, with a. slidably mounted stop for limiting the position of the piston.

Another object is to have the said stop consist of a rod which is slidably mounted in one end of the cylinder for quickly moving the rod into an approximate limiting position for the said piston and to provide a micrometer thread at the outer end of the rod for more accurately adjusting the said position, and a variably positioned abutment member having mounted therein a threaded means for cooperating with said micrometer thread for moving the said rod in a direction lengthwise thereof.

Other objects and advantages will hereinafter appear.

We attain these objects by the machine which is illustrated in the accompanying drawings or by'any mechanical equivalent or obvious modifications of the same.

In the drawings;

Figure 1 is a fragmentary vertical section On the line l--l of Figure 2 and on the line ll of Figure 3, looking in the direction of the arrows.

Figure 2 is a fragmentary horizontal section on the line 2-2 of Figure 1, looking in the direction of the arrows.

Figure '3 is a fragmentary section on the line 3-3 ofFigure l; and Figure 4 is a fragmentary section on the line 4--4 of Figure 1, looking in the direction of the arrows.

Figure 5 is a detail in cross-section drawn to a larger scale on the line 55-5--5 of Figure 4 of the feed nut which is hereinafter described and the abutment member carrying the same, which is hereinafter described.

.Similar numerals refer to similar. parts throughout theseveral views. i.

l l designates a measuring cylinder for the liquid to be dispensed and measured and l2--a piston, the limiting position of which in the cylinder determines the volume of the dispensed liq- 4gClaims. (Cl. 222-250) uid. The cylinder H and piston l2 may be made of glass or any other suitable material.

The ends of the cylinder I l are shownasclosed by hollow discs or chambers l3 and I4; packing rings [5 of rubber or other soft material are shown as interposed between the ends ofthe cylinder II and the adjacent sides of the discs I3 and M.

The discs 13 and It are kept in contact with the ends of the cylinder II by means of a screw 32, a bar 33 and a pair of rods 34 which pass through the discs 13 and I4 and are anchored against the outer side of the latter by means of heads 35.

The interior of each of the chambers 13 and I4 is divided bywalls l6 and Ilia respectively into two compartments I1 and I8 and l'lwand IBa respectively; the interior of the cylinder ll communicates with the compartments I1 and I8 and Ila and [8:1, by means of passages I9 and in the inner wall of each of these compartments.

The compartments l8 and 18a are shown as connected each by meansoi a tube 2! to an air valve 22 for discharging therethrough any air which may find its way into the system; the compartments l1 and Ila communicate by means of tubes 23 and respectively with passages 25 and 26 respectively of a valve casing 21.

The casing 2! communicates by means of passages 28 and 29 respectively with an inlet 30 and an outlet 3! for the dispensed liquid, which may be conveyed to the machine by gravity or pressure, orboth.

The casing 21 encloses a conical valve 36 which is carried by a mounting plate 31 and has thereon on the periphery thereof in a plane transversely thereto a pair of grooves 38 and 39 which communicate alternately with the passages 28 and 25 and with the passages 26 and 29.

In the position shown in Figure 1, the groove 38 communicates with the passages 28 and 25 and the groove 39 communicates with the passages 26 and 29.

The valve 36 has thereon at one end thereof a head 40, which has connected thereto a lever 4|,

by means of which the valve may be oscillated through an angle of degrees from the position of the lever at 4| toits position shown in dotted lines at Ma.

The lever M may be operated by either hand power or foot power or otherwise, if desired, and its extreme-positionsmay be determined by suitablestops which are not shown in the drawings.

The valve 36 is kept against itsseat inthe'casing 2lby a spring 43 encompassing a stem 42 at the other end of the valve 36; said spring is abutting at one end thereof against a nut 44 on the threaded outer end of the stem 42 and at the other end thereof against a cap 45 encompassing the inner end of the stem 42 and abutting against the end of the casing 21, as shown in Figure 2 of the drawings.

In the position of the valve 36 as shown in Figure 1 liquid is or has been flowing from the inlet 30 to the left end of the cylinder I 1, thereby moving the piston i2 from the inner wall of the chamber l3 to the inner end of the rod or stop 45; the flow of the liquid is then discontinued after an equal volume of the liquid has simultaneously been discharged from the right end of the cylinder it into and through the outlet 3i.

The position of the valve 36 may then be changed by turning the lever 4| through an angle of 90 degrees to the position at 4| a; the flow of the liquid thereupon proceeds from the inlet 30 to the right hand end of the cylinder H and from the left hand end of the cylinder I l to the outlet 3|, thereby moving the piston l2 from the position shown in Figure l to the left end of the cylinder, whereupon the flow is discontinued until the lever 4| is again turned from the position at 4m to its original position at 4 I.

The volume of liquid discharged during a' stroke of the piston I2 depends upon the position of the rod or stop 46 the end of which acts as a stop for the piston I2; by moving the rod or stop 46 through the wall [Ea to the right or to the left and fixing it in a new position the desired volume of the liquid to be dispensed may thereby be changed.

To efiect this change approximately and quick- .ly we provide a sliding lit for the rod or stop 46 through the wall 16a and to accurately adjust the limiting position of the piston l2 we provide an adjusting thread 41 at the outer end of the rod or stop 46; this thread is in mesh with a feed nut 49, which is interiorly threaded and has thereon a knurled disc 49a asshown in Figures 1, 4 and 5.

The feed nut 49 is carried by a bifurcation 50a of an abutment member 55 which is secured to the outer end of a bar which is parallel to the rod or stop 46 and is slidably connected to a bracket 52 which is secured to the outer wall of the chamber 14 by means of a suitable screw 58 as shown in Figures 1 and 3.-

The bar 5! is detachably secured to the bracket 52 by means of a screw 53, and, when free to move in the bracket 52, the bar 5| may be moved together with the rod or stop 46 for locating the approximate position of the piston E2; the bar 5| is then secured to the said bracket 52 and the bifurcation 55a on the member 50 then serves as contact with the outer branch of the bifurcation 50a, as shown in Figure 1.

To keep the threaded end 41 of the rod or stop 46 from being rotated by the nut 49, a collar 54 is secured to the rodor stop 45, as by means of a screw 55 or otherwise, and the collar 54 is connected by means of a rod 51 to a sleeve 56 which is slidably mounted on the bar 5|, whereby the rod or stop 46 with the threaded end 41 thereon may be moved by the nut 49 in a direction lengthwise the bar 5| without rotating the threaded end 41 of the rod or stop 46 when the said nut 49 is turned.

Variations are possible and parts of our invention may be used without other parts.

We do not, therefore, restrict ourselves to the details as shown in the drawings.

We claim as our invention and desire to secure by Letters Patent:

1. In a machine for measuring and dispensing variable volumes of liquid, a cylinder, a piston slidably mounted therein, a means for admitting liquid into one end of the cylinder and for discharging it therefrom, the piston to be moved by the liquid, and a stop means in said cylinder for limiting the stroke of the piston, the stop means being integral with a rod slidably connected to the cylinder and terminating at the inner end thereof in said stop means, said rod being threaded at its outer end, combined with an abutment member having thereon a part which is freely slidably connected to a part on the cylinder, a means for detachably connectin the abutment member to the said part of the cylinder, said member, when detached from said part, being disposed to be freely slid by a nonrotary motion in a plane parallel to the cylinder, a nut carried by said member in mesh with the threaded outer end of said rod, and a means for imparting relative rotation to said rod and nut with reference to each other for adjustably varying the position of said rod lengthwise thereof with relation to the abutment member, whereby, for changing the volume of liquid to be admitted to the cylinder, the abutment member may be detached from said part of the cylinder and freely slid with said rod by a nonrotary motion to an approximately limiting position of the stop means for the piston in the cylinder, whereupon the abutment member may be reattached with relation to the cylinder and the exact position of the said rod lengthwise thereof may then be accurately adjusted by the relative rotation of said nut and said rod with reference to each other through a limited distance and in a relatively short time for the exact limiting position of the said stop means.

2. In a machine for measuring and dispensing variable volumes of liquids, a cylinder, a piston slidably mounted therein, a means for admitting liquid into one end of the cylinder and for discharging it therefrom, the said means to be moved by the liquid, and a stop means in said cylinder for limiting the stroke of the piston, whereby to determine the desired volume of liquid to be admitted to the cylinder during the stroke of the piston, the said stop means being integral with a rod slidably connected to the cylinder and terminating at the inner end thereof in said stop means, said rod being threaded at its outer end, combined with a bar freely slidably connected at its inner end to said cylinder, a means for detachably fastening the said bar to the cylinder, an abutment member at the outer end of the bar integral therewith, a nut carried by said member in contact therewith and in mesh with the threaded outer end of said rod, said bar when detached being disposed to be freely slid by a nonrotary motion in a plane parallel to the cylinder, and a means for imparting relative rotation to said rod and nut with reference to each other for adjustably varying the position of the rod lengthwise thereof with relation to the bar, whereby, for changing the volume of liquid to be admitted to the cylinder, the bar may be detached from the cylinder and with said rod may be freely slid by a nonrotary motion to an approximately limiting position of the stop means for the piston in the cylinder whereupon the bar may be reattached to the cylinder and the exact position of the said rod lengthwise thereof may then be accurately adjusted by the mutual relative rotation of said nut and said rod with reference to each other through a limited distance and in a relatively short time for the exact limiting position of the said stop means.

3. In a machine for measuring and dispensing variable volumes of liquids a cylinder, a piston slidably mounted therein, a means for admitting liquid into one end of the cylinder and for dis charging it therefrom, the said piston to be moved by the liquid, and a stop means in said cylinder for limiting the stroke of the piston, whereby to determine the desired volume of liquid to be admitted to the cylinder during the stroke of the piston, the said stop means being integral with a rod slidably connected to the cylinder and ter minating at the inner end thereof in said stop means, combined with a means for quickly changing the position of the stop means, comprising a bar parallel to said rod, freely slidably connected at its inner end to the cylinder and terminating at the outer end thereof in an abutment member, a means for detachably fastening the said bar to the cylinder, the said rod being threaded at its outer end, a feed nut carried by said member in contact therewith and in mesh with said outer end, the said bar when detached being disposed to be freely slid by a nonrotary motion in a plane parallel to the cylinder, whereby, for changing the volume of liquid to be admitted to the cylinder, the said bar may be detached from the cylinder and with said rod may be freely slid by a nonrotary motion to an approximately limiting position of the stop means, whereupon, the said bar may be reattached to the cylinder and the exact position of the rod, lengthwise thereof may then be accurately adjusted by the said feed nut through a limited distance in a relatively short time for the exact limiting position of the stop means.

4. In a machine for measuring and dispensing variable volumes of liquids a cylinder, a piston slidably mounted therein, a means for admitting liquid into one end of the cylinder and for discharging it therefrom, the said means to be moved by the liquid, and a stop means in the cylinder for limiting the stroke of the piston, whereby to determine the desired volume of liquid to be admitted to the cylinder during the stroke of the piston, the said stop means to be integral with a rod threaded at the outer end thereof and slidably connected to the cylinder, said rod terminating at the inner end thereof in said stop means, combined with a bar freely slidably connected at its inner end to the cylinder and detachably fastened thereto, said bar when detached being disposed to be freely slid by a nonrotary motion parallel to the cylinder and said bar terminating at the outer end thereof in a bifurcated member, an interiorly threaded disc rotatably connected to the bifurcation and placed between the two branches thereof in alternate abutment with each of said branches, the interior thread of the disc being in mesh with the threaded outer end of the rod, and a means to prevent the rotation of the rod with relation to the cylinder, whereby, for changing the volume of liquid to be admitted to the cylinder, the bar may be detached from the cylinder and with said rod may be free- 13' slid by a nonrotary motion to an approximately limiting position of the stop means for the piston of the cylinder, whereupon the bar may be reattached to the cylinder and the exact limiting position of the rod lengthwise thereof adjusted by rotation of the said disc through a limited distance and in a relatively short time.

JOSEPH KAHL. GEORGE H. MULLER.

REFERENCE S CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 939,382 Beard Nov. 9, 1909 1,181,259 Sailer May 2, 1916 2,300,110 De Hoog Oct. 27, 1942 

